Friction hinge



M 3, 1927. COSTELLO FRICTION HINGE Qriginal Filed June 4. 1920 Patented May 3; 1927.

' NTTiED STATES RATEN o FFJrC E;

rs-norms CO'STELLQ, on CHICAGO, ILLINOIS; Rose M. 'co's'rnnno Ann wmmM-E. cos'rnnno, nxnonronsor sAIn 'rHoMAs-EcosrELL DECEASED, ASSIGNORS r ROSE M. COSTELLO, TRUSTEE.

es'nro'rIoN HINGE.

Application filed June 1, 1920, Serial No; 386,643. Renewed June 19, 1925.

My inventionwrelates to friction hinges for movable stands in which a display panel is rotatively mounted by means of pivot hinges or trunnions'between a plurality of 5 suspending members. 3 The general struc-' ture which is the subject ofmy invention a may be illustrated by that of a movable black-boarchin which the boa-rd on which the chalks are applied is suspended between twouprights and adapted to be rotated to change the inclinationthereof or to display alternatively one or the other of the two faces.

'Vhensuch devices are set tor usepit i-s necessarythat the pivotal connection shall be adapted to be tightened sothat the board or panel shall retain a rigid position relativelyto the supports While in use or while work is being done thereon.

bolts, passing through the supports and taking into screw. threaded members rigidly vattached to the swinging frame, hand pieces being provided for tightening ,or loosening the bolts. The objectionable feature oitthis' construction consists "in the fact that,when

the ordinarily .right handed screw threaded It is one object or in invention to provide simple, cheap, and e cient means for pi.v

otally securing a displayboardor panelu'p- 40 on a supporting frame in. such manner that it maybe readily turned to any angleof inclination upon the pivot hinges, or 'ro tatedfto display either side as desired; it is a further object or" my invention 'to provide pivothinges or trunnions tor'the board 01 panel, which may be detachable from each other whereby the board or panel may be' connected or detached from the supports,

and to provide a hinge or trunniomtheparts sion and in which thejpart's are so positively held in such relation, that relative rotation v p This tens on 20 hasusually been provided by screw threaded oi \i hic'h may be adjusted in frictional' or; clamping engagement at any degree often ineither directionwill not vary thetension at which they are set. r

The principles of my invention are. illus trated inthe drawing in which Fig. l is a,

front elevation of a black-board, pivotally mounted upon supporting standards. Fig. 2, is an enlarged vertical section of one of the hinges ortrunnions. Fig. 3 is a sectIon on the line 33 of Fig. 2. Fig. 4 ILiS a section on the line 44of Fig. 2.

\Rererring to the drawings in which like characters of reference denote like parts throughout, a black-board panel is rrepresented by the letter A and it is supported upon a pair of standards 5, 5 by means of pivot hinges each of which is represented as a whole by the letter B. Below the blackboard the standards are detachably' connected by a cross-bar or chalk-rail! having at each end thereof angle brackets '8.

Each of the hinges or trunnions B includes a relatively stationary member 10, which is mounted on the stand-ardfi and a member 11 rotatably movable relatively thereto, secured to the board or panel A; and provided with flanges 12 by which the lattachinent by means of the screws isf reinf forced and strengthened. The rela'tively 'stationary and movable hinge'menibers are -reciproca'lly formed to co-act with 'eachlother,

andiniay be given the relative forms show in Fi .i 2 in which -10 is provided fivith an annula flange 13, adapted to rest upon the annular ledge 14. 'An el'ongated'head T5 provided if desired, which will'seat in the bottom of'th'e cup 16 formedby flange 13.

But the relative form and proportions of these parts is 1mmater1al,,it,be1ng under stood that their proximate faces are adapted to co-act with each other and that openings 18 and 19 extendaxially thro'u'glrsaid j'q'ait'sh in alinement with veach other and ali'ne'd' and adapted to be alined with a correspon'd ing 1 opening 20, extended through the up right '5. A wear plate 22 having an opening 23 shouldbe secured on the outer face of up right 5; A'pivotbolt 25 extendsthroughout' the openings 18, 19, 20 and 23and maybe secured to the relatively movable fniember 11 asillustrated in the device shown. This mayb by means ofan angulariheadi '26, V

seated in a corresponding depression 27, the relatively rotatable member, but it is manently attached thereto by being cast therein as a chill. A clamping plate or washer 28 is irrevolubly mounted on the body of pivot bolt and slidable' thereon,

In order that it shall be secured against rotation, the shaft of said pivot bolt maybe angular in cross-section, and the said Washer provided with a correspondingly angular opening. The end of said pivot bolt is screw threaded to receivea threaded nut 29 which should be formed integrally with a hand wheel 30.

It will thus be seen that, when the hand wheel is turned, the relatively stationary and movable parts 10 and 11 will be drawn into frictional contact with each other to any degree of tension, and that the board-or pannel A attached to such relatively movable member-1.1, may be set at any desired degree o of inclination or revolved as desired without varying the frictional engagement with the relatively stationary member 10.

I claim V 1. In a friction hinge; the combination with a relatively stationary member and a a with a'relatively stationary member and a relatively rotatable member co-acting there with and provided with alined openings, of a pivot bolt having an angular body portion attached to and rotating with said last named member extending alined openings, a clamping plate having an angular opening slidably mounted on said angular body portion of said bolt, and means for adj'ustably positioning said clamping plate'on said bolt. I a

3. In a friction hinge; the combination of a relatively stationary member and a relatively rotatable member, said relatively stationary and rotatable members being pro vided with reciprocally formed co-acting parts with said lastfnamed member extending through said alined openings, a clamping plate slidably and relatively non-revolubly mounted on said bolt, and means for adjust- Ebly positioning said clamping plate on said olt. o v 4. In a friction hinge; the combination of a relatively stationary member a relatively rotatable member co-acting therewith having an angular recess, a pivot bolt having through said V and provided with alined 7 open: ings, a pivot bolt attached to and rotating an annular head seated in said recess and having an angular body portion and a screw threaded end extending through said alined open ngs, a clamping plate having an angular opening slidably mounted on said angular; body portion, and a nut to adjustably position said clamping plate on said bolt.

5. In a friction hinge; a relatively stationary hinge member and a bearing plate provided with openings adapted to be alined with each other, a pivot bolt rotatable in said alined openings, a hinge member se-V 'cured to said plvot bolt to frictionally engage with the first named hinge member, a clamping plate non-revolubly securedlto the pivot bolt to engage said bearing plate, and a nut on the pivot bolt to give longitudinal movement of the clamping plate on said bolt. '1

' 6. In a friction hinge the combination of co-acting relatively stationary and rotatable members, a pivot bolt secured'to therotat:

able member against rotation, relative there to and extending through the stationary, 7

member, a clamping piece longitudinally slidable and non-rotatable on the pivot bolt, and means for giving relativemovement of said rotatable'member and said clamping piece toward each other, s

'7. In a pivot hinge; a plurality of members adapted to be securedjin rigid relation to ,eachother and provided with alined openings, a shaft'rotatably passing through said openings,ia rotatable head mounted on one end of said shaft andffrictionally engage able with one of said first named members, a washer longitudinally slidable and nonrevolubly mounted on "the other end of said shaft to engage with the other one of said first named members, and a threaded device to move saidwasher on said shaft.

8. In afriction hinge; .a pair of clamping members, one of which is movable relative to the other member, said clamping members being arranged in telescopic relation, a sup-1 port for the clamping member, a pivot bolt 1 passing non revolubly through the movable member and revolublythrough the immovable member and support, and means on the pivot 'bolt to co-act with such su'p 'ort and give longitudinal movement to the plvot olt so as to hold the frictional faces in adj ustably operative relation. V

9. In a friction hinge; a pair oat-clamping 7 members, onegof which is movablerelative to theother member, said clamping mem-- bers being arranged in telescopic relation,

a support for the clamping members,a wear plate and a clamping Washer mountable on said support on the side op osite to thesaid clamping members, a pivot olt passing nonrevolubly through the movable member-and the clampingwasher and passing revolubly through the immovable member and the wear plate, and means on the pivot bolt for moving said clamping member and said clamping plate relatively to each other so that the frictional faces of the clamping members may be in adjustably operative relation.

10. In a friction hinge; a pair of clamping members one of which is movable relative to the other member, said clamping members being arranged in telescopic relation, a support for the clamping members, a Wear plate and a clamping Washer mountable on said support on the side opposite to the said clamping members, a pivot bolt having a squared head seated in the movable revolubly through the clamping Washer, and

means on the pivot bolt for moving said clamping member and said clamping plate relatively to each other so that the frictional faces of the clamping members may be in adjustabl operative relation.

In Witness W ereoflI have hereto set my hand at Chicago, Illinois, this 29th day of May, 1920.

THOMAS H. COSTELLO.

further passing revolubly through the im- 1 -movable member and the Wear plate, and 

